From: Mahesh Sivasubramanian <[email protected]> Command DB provides information on shared resources like clocks, regulators etc., probed at boot by the remote subsytem and made available in shared memory.
Cc: [email protected] Signed-off-by: Mahesh Sivasubramanian <[email protected]> Signed-off-by: Lina Iyer <[email protected]> --- .../devicetree/bindings/arm/msm/cmd-db.txt | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/msm/cmd-db.txt diff --git a/Documentation/devicetree/bindings/arm/msm/cmd-db.txt b/Documentation/devicetree/bindings/arm/msm/cmd-db.txt new file mode 100644 index 000000000000..e21666e40ebf --- /dev/null +++ b/Documentation/devicetree/bindings/arm/msm/cmd-db.txt @@ -0,0 +1,38 @@ +Command DB +--------- + +Command DB is a database that provides a mapping between resource key and the +resource address for a system resource managed by a remote processor. The data +is stored in a shared memory region and is loaded by the remote processor. + +Some of the Qualcomm Technologies Inc SoC's have hardware accelerators for +controlling shared resources. Depending on the board configuration the shared +resource properties may change. These properties are dynamically probed by the +remote processor and made available in the shared memory. + +The devicetree representation of the command DB driver should be: + +PROPERTIES: +- compatible: + Usage: required + Value type: <string> + Definition: Should be "qcom,cmd-db" + +- memory-region: + Usage: required + Value type: <phandle> + Definition: The phandle to the reserved memory region. + +Example: + + reserved-memory { + [...] + cmd_db_mem: qcom,cmd-db@c3f000c { + reg = <0x0 0xc3f000c 0x0 0x8>; + }; + }; + + qcom,cmd-db@c3f000c { + compatible = "qcom,cmd-db"; + memory-region = <&cmd_db_mem>; + }; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
